{"version":"1.0","provider_name":"The Audio People","provider_url":"https:\/\/theaudiopeople.com.vn\/vi","author_name":"admin","author_url":"https:\/\/theaudiopeople.com.vn\/vi\/author\/admin\/","title":"Questyle CMA18P Portable - The Audio People","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"UlJN8BMNXV\"><a href=\"https:\/\/theaudiopeople.com.vn\/vi\/san-pham\/questyle-cma18p-portable\/\">Questyle CMA18P Portable<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/theaudiopeople.com.vn\/vi\/san-pham\/questyle-cma18p-portable\/embed\/#?secret=UlJN8BMNXV\" width=\"600\" height=\"338\" title=\"&#8220;Questyle CMA18P Portable&#8221; &#8212; The Audio People\" data-secret=\"UlJN8BMNXV\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/theaudiopeople.com.vn\/wp-includes\/js\/wp-embed.min.js\n<\/script>","thumbnail_url":"https:\/\/theaudiopeople.com.vn\/wp-content\/uploads\/2025\/10\/CMA18_01_1.jpg","thumbnail_width":1080,"thumbnail_height":1080,"description":"In response to the newest generation of challenging flagship earphones comes the\u00a0Questyle Audio\u00a0CMA18P 4.4mm DAC\/amp to rule them all. Battery-powered, this\u00a0AKM AK4493SEQ\u00a0current-mode monster\u00a0runs the\u00a0Empire Ears Raven and Subtonic Audio Storm\u00a0with ruthless, total capability.\u00a0 Questyle adhere faithfully to current-mode amplification at all form factors, and build the ultimate version of M15i. And \u2013 with four desktop-class current-mode amplifiers, and a built-in battery power supply to free CMA18P from the handicap of USB&#8217;s 5-volt source \u2013 the capabilities of their now-flagship portable just got extended. It&#8217;s easy to hear. Operating in current-mode, audio signal gets passed in current instead of the more standard voltage. Certainly, headphones from Focal, Fostex plus HIFIMAN, Rosson Audio Design and ZMF Headphones could not ask for a better 4.4mm portable source. And Raven, Storm, and Symphonium Audio&#8216;s Crimson all\u00a0provide instant synergy,\u00a0given their low impedances \u2013 and current signals excel the closer a load is to ground, mimicking a dead short.\u00a0[See Product Desc. For More] Even before CMA18P&#8217;s power and signal arrive at the final destination \u2013 your\u00a0flagship earphones and headphones\u00a0\u2013 current-mode amplification is already working its magic. It eliminates the lag time of the signal that might otherwise occur, as it builds up at the capacitances in the circuit\u00a0\u2013 current signal passes through unhindered as compared to voltage, with speed and ease. By doing away with the issue of transmission delay in CMA18P, Questyle virtually eliminates any of the harshness\u00a0caused by the intermodulation distortion associated with high capacitance, solid-state circuits. That small signal then takes advantage of being unhindered by capacitance in the signal path. An added benefit from current-mode amplification is that huge signal bandwidth is possible, leading to phase response being accurately preserved in the human hearing range. Indeed, to hear current-mode is to hear a naturalness to music not encountered before in a conventional circuit, and Questyle build\u00a0CMA18P as a portable TOTL expression of such a topology.\u00a0 Now working with Asahi Kasei Microdevices (AKM)\u2019s resurgent AK4493SEQ and\u00a0a XMOS XU316 USB receiver for a pristine digital decode, the analog section of CMA18P preserves the converted audio to present it smoothly and organically, without exaggerated warmth or bloat. For those who wish to experiment with other sources, a pair of line-ins are also included. Happily use CMA18P with any low-impedance device bolstered by four desktop-level current-mode amplifiers as Questyle&#8217;s purest portable voltage source yet.\u00a0 CMA18P pushes\u00a0gear such as Focals, Fostexs, HIFIMANs,\u00a0Rosson Audio Designs, and\u00a0CIEM heavyweights Craft Ears,\u00a0Empire Ears\u00a0\u2013 particularly the Raven,\u00a0Odin and Legend Evo\u00a0\u2013 and Vision Ears\u00a0effortlessly. Driving low impedances is CMA18P&#8217;s forte. Still, the bridge-tied load balanced operation with four amplifiers outputting means this\u00a0Questyle also doubles voltage swing compared to single-ended operation, to drive higher impedances like\u00a0HEDD Audio&#8216;s HEDDPhone 2 and ZMF Headphones&#8216;\u00a0Caldera credibly too. CMA18P is all you&#8217;ll need with the low-impedance gear you&#8217;ll commonly carry outdoors or at work. Otherwise, explore how Questyle&#8217;s current-mode scheme in CMA15 can further benefit your planar-magnetic headphones at the desk, or browse our other mobile DAC\/amps here."}